タイトジャンクション構成蛋白質Claudinを利用した新規薬物送達方法の構築
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概要
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Recent remarkable progress in genomic novel drug discovery enables us to prepare drug candidates with tremendous diversity in a high-throughput-manner. In clinical use of these candidates, they should be effectively delivered to a targettissue in body. But delivery systems suitable for the high-throughput discovery of drugs have never been established. Tight junctions (TJs) play a pivotal role in compartmentation of each tissues and maintenance of their intra-circumstances. Claudin, a membrane protein with four trans-membrane domains, have recently found to be responsible for the barrier-function of TJs. Claudin is constituted of 24 family members, and expression profiles and barrier-function of claudin differ interestingly among the family members. These findings indicate that a modulator of the unique barrier-function of claudin may be used for drug delivery. In this respect, we have investigated whether a claudin is a target for drug delivery. A claudin modulator (C-terminal fragment of Clostridium perfringens enterotoxin, C-CPE) had 400-fold jejunal absorption-enhancing activity to a clinically used absorption-enhancer, and interaction between C-CPE and claudin was essential for the enhancing activity. We have already prepared a screening system for claudin-targeting molecule. Now we are performing functional domain mapping of C-CPE, and we will attempt to prepare a various type of claudin modulator in a future. In the current review, I introduce our recent works on development of a novel strategy for drug delivery system using claudin modulator, and I discuss also possibility of claudin modulator in drug delivery system.
- 2006-09-01
著者
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近藤 昌夫
大阪大学大学院薬学研究科
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近藤 昌夫
大阪大学大学院 薬学研究科
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近藤 昌夫
Graduate School Of Pharmaceutical Sciences Osaka University:department Of Pharmaceutics And Biopharm
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近藤 昌夫
Graduate School Of Pharmaceutical Sciences Osaka Univ.
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Kawase M
Research And Development Center Kobayashi Pharmaceutical Co. Ltd.
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Kawase Masaya
Faculty Of Education Kagawa University
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